Implement undo.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/term.rs b/src/term.rs
index 9c7e2cc..3a56091 100644
--- a/src/term.rs
+++ b/src/term.rs
@@ -68,6 +68,7 @@ pub fn raw() -> Result<RawHandle, Box<dyn Error>> {
 pub enum Key {
     CtrlQ,
     CtrlS,
+    CtrlZ,
     Up,
     Down,
     Left,
@@ -79,6 +80,7 @@ pub enum Key {
 pub fn read_key() -> Result<Key, Box<dyn Error>> {
     const CTRL_Q: u8 = 17;
     const CTRL_S: u8 = 19;
+    const CTRL_Z: u8 = 26;
     const BACKSPACE: u8 = 127;
     const ESC: u8 = 27;
 
@@ -91,6 +93,9 @@ pub fn read_key() -> Result<Key, Box<dyn Error>> {
         if buf[0] == CTRL_S {
             return Ok(Key::CtrlS);
         }
+        if buf[0] == CTRL_Z {
+            return Ok(Key::CtrlZ);
+        }
         if buf[0] == BACKSPACE {
             return Ok(Key::Backspace);
         }